For many years, there has been a persistent achievement gap between the performance of males and females in math and the sciences. It has become increasingly apparent, however, that the problem is cultural. The math gap seems to vanish in countries with higher degrees of gender equality, while females exposed to the stereotypical expectation that they’d do worse in a subject tended to live down to these low expectations. These findings, however, don’t provide clear guidance as to how to address the problem: if females have already been exposed to these stereotypes, how do you get them to ignore them and perform up to their abilities? The answer, it appears, may be as simple as a short essay.